Stewart, who will be making his Amp’d Mobile World Supercross GP debut, joins Ricky Carmichael, the reigning Amp’d Mobile World Supercross GP champion, and Chad Reed, the 2003 World Supercross GP champion, to make the most competitive Amp’d Mobile World Supercross GP line-up ever.

"I felt like racing the world rounds this year because knew they would be fun, and this year’s line-up is bigger than ever,” said Stewart. “Clear Channel always does a great job, and I know those races would help me get some momentum before Anaheim. The world rounds are becoming an important part of supercross racing. I have found that I have lots of fans in other countries, and the world rounds can help our sport grow even more."

Stewart, 19, won three 250cc main events in his rookie season of AMA Supercross Series racing. Prior to entering the 250cc division Stewart won both the 125cc Eastern and Western Regional 125cc AMA Supercross Series championships.

“I think the world rounds are a great opportunity for me and our sport to reach new people,” said Stewart. “I am looking forward to seeing the Canadian fans and want to give them a great race to watch."